Improvement in steam-pumps



N.PETERS, PHDTuLITHOGRAPMER. WASHINGTON. D C.

PATENT OFFICE@ FELIX. EROI/VN, OF NEW YORK, N. Y.

IMPROVEMENT iN STEAM PUMPS.

Specification forming part ot' Letters Patent No. 5 1,291, dated December 5, 1365.

To all whom t may concern:

Beit-known that I, FELIX BROWN, ofthe city, county, and State ot' New York, have invented a new and Improved SteanrPnmp; and I do hereby declare that the tbllowing is atull, clear, and exact description thereof, which will enable others skilled in the art to make and use the same,reterence being had to the accompanying drawings, forming part ot' this specification, in which- Figure l represents a longitudinal section of this invention. Fig. 2 is a side elevation ot' the same.

Similar letters ot' reference indicate like parts.

This invention relates to a steam-pump in which the ordinary piston-pump is replaced by two plunger-pumps arranged on the opposite ends of the steam-cylinder, and by these means all the ditticulties now experienced with the pistons of the piston-pum ps and with their cylinders are avoided, the plunger or plungers in this improved pump being so arranged that the packing can be readily tightened and the pump can be made to operate for a long time without requiring any repairs. The steam in the steam-cylinder is changed by a valve-motion otpeculiar construction, said motion being composed ot' a spring-hook which slides on the surface ot' a double toe that is secured to the rock-shaft governing the position ot' the steamvalve, and the ends ot' which rest on stairshaped spring-catches in such a manner that, by the action ofthe sliding` springhook which rcciprocates with the piston -rod, the stairshaped spring'pawls are disengaged and the double toe is caused to change its position, thereby changing the steam-valve instantaneously whenever the steam-piston approaches either end of its stroke.

Arepresents the steam-cylinder of my pump, in which the piston B moves back and forth in the usual manner. The piston-rod C extends through both heads ofthe cylinder and its ends form plungers D, which work in barrels E, which are secured one opposite to either head of the steam-cylinder. Said barrels are provided with stuftng-boxes F, of any suitable construction, so that the plungers D can be made to work air or water tight in the barrels E, and regular plunger-pumps are obtained.

The great advantage ot' the plunger-pump over an ordinary piston-pump when used as a steam-pump consists particularlyin the fact that the piston and cylinderofa piston-pump are liable to wear out very quick by sand or other impurities contained in the water, and, in order to repair them, or even if it is desirable to get at the packing ot the pump-piston, the pump has to be stopped and the cylinder has to be opened, all of which causes much trouble andV loss of time; whereas, the packing in the plunger-pumps can be readily tightened up from the outside and without even stopping the pump, and it the packing in one of the stuffing-boxes should wear out it can easily be replaced at a tritling expense. The plunger-pumps can be made easy, they are easily kept iu repair, and they work just as economically, or more so, as the best pistonpump.

The barrels E of my pumps are secured to the inner plates ot' the valve-chambers G, each ot which contains two valves which open in opposite directions, and one of which leads to the suction-pipe, whereas the other leads to the ascension-pipe. The play ot' the valves and the Aoperation ofthe pump will be readily understood from Fig. l of the drawings, and requires no further explanation.

The steam in the steam-cylinderAis changed by a valve of any suitable construction, which is inclosed in a valve-chest, H, and the stem I of which connects to au arm, a, mounted on a rock-shaft, b. This rock-shaft has its bearings in a suitable standard, c, which rises from the frame or bed of' the pump, and on its inner end is mounted a double toe, d, which forms the guide for the sliding spring-hook e. This hook is subjected to the action of a spring, f, which has a tendency to draw it down, and a reciprocating motion is imparted to it by a slotted standard. g, which is mounted ou the piston-rod C, and which straddles the end of a pin, c', secured in the inner side ofsaid hook. The ends ot' the toe d rest upon stair-shaped pawls or catches h h', which are mounted on pivots t' fi', and which are drawn together by a spring, j.

ln the position in which the pump is shown in Fig. 2 of the drawings the steam-piston is supposed to move in thc direction ofthe arrow marked on the cylinder A, and as the saine approaches the thread ot' its stroke the hookslide e, by coming in contact with the pawl h', trips the toe d and the steam-valve is changed. On the return-stroke of the steam-piston the hook-slide strikes the pawl h, and the toe d is tripped in the opposite direction, the tripping operation being effected by the action of the spring f, which constantly has a tendency to pull said hook-slide down, and Which acts on the toe as soon as its point is relieved from the pawl supporting the same, and the pawls h h are so arranged that they alternately support the ends of the double toe on their lower and then again on their uppershoulders or steps, as shown in Fig. 2. By this arrangement the valve is changed at the proper moment With an imperceptible loss ot' power, and the pump Works easy and Without a ily-wheel.

Having thus described myinvention, I claim as new and desire to secure by Letters Patent- FELIX BROWN.

Witnesses:

M. M. LIVINGSTON, C. L. TOPLIFF. 

